For the motion of the plane it is given to us that it travel 15.0 km in 15.3 s
So here we can use the formula of average velocity to find it
formula is given as ratio of total displacement and total time
[tex]v = \frac{displacement}{time}[/tex]
here it is given that
[tex]displacement = 15.0 km[/tex]
time = 15.3 s
we need to convert the time into hour as the speed is required in km/h
so we know that
[tex]1 h = 3600 s[/tex]
[tex]t = 15.3 s * \frac{1h}{3600 s}[/tex]
[tex]t = 4.25 * 10^{-3} h[/tex]
now by the above formula
[tex]v = \frac{15.0}{4.25 * 10^{-3}}[/tex]
[tex]v = 3529.4 km/h[/tex]
so the velocity of the plane would be 3529.4 km/h
